EP1480372A4 - Communication apparatus and communication system - Google Patents

Communication apparatus and communication system

Info

Publication number
EP1480372A4
EP1480372A4 EP03707115A EP03707115A EP1480372A4 EP 1480372 A4 EP1480372 A4 EP 1480372A4 EP 03707115 A EP03707115 A EP 03707115A EP 03707115 A EP03707115 A EP 03707115A EP 1480372 A4 EP1480372 A4 EP 1480372A4
Authority
EP
European Patent Office
Prior art keywords
section
security data
propagation environment
encryption key
confidential information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03707115A
Other languages
German (de)
French (fr)
Other versions
EP1480372A1 (en
Inventor
Masayuki Orihashi
Yutaka Murakami
Katsuaki Abe
Akihiko Matsuoka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Corp of America
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to EP20110184395 priority Critical patent/EP2479923A1/en
Priority to EP20100154511 priority patent/EP2276193A1/en
Priority to EP20110184399 priority patent/EP2461517A3/en
Priority to EP11184390A priority patent/EP2479922A1/en
Publication of EP1480372A1 publication Critical patent/EP1480372A1/en
Publication of EP1480372A4 publication Critical patent/EP1480372A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7113—Determination of path profile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0852—Quantum cryptography
    • H04L9/0858—Details about key distillation or coding, e.g. reconciliation, error correction, privacy amplification, polarisation coding or phase coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/08—Secret communication by varying the polarisation of transmitted waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/10—Secret communication by using two signals transmitted simultaneously or successively
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/80—Wireless
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/60—Context-dependent security
    • H04W12/69—Identity-dependent
    • H04W12/77—Graphical identity

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Theoretical Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Facsimile Transmission Control (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Receiving section 102 receives security data. Propagation estimating section 103 estimates a propagation environment based on a reference signal transmitted from a communicating party. Demodulation section 104 demodulates the security data. Coding section 105 encodes information of estimated propagation environment to generate confidential information corresponding to the propagation environment. Buffer 106 temporarily stores the encoded confidential information. Decoding section 107 interprets the security data encrypted using an encryption key input from demodulation section 104, using encryption key information input frombuffer 106, to decode, and acquires the security data. It is thereby possible to ensure high security without changing the communication system greatly. <IMAGE>
EP03707115A 2002-02-28 2003-02-27 Communication apparatus and communication system Withdrawn EP1480372A4 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20110184395 EP2479923A1 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system
EP20100154511 EP2276193A1 (en) 2002-02-28 2003-02-27 Communication Apparatus and Decoding Method
EP20110184399 EP2461517A3 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system
EP11184390A EP2479922A1 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP2002054064 2002-02-28
JP2002054064 2002-02-28
JP2002132068 2002-05-07
JP2002132068 2002-05-07
JP2003048364A JP2004032679A (en) 2002-02-28 2003-02-25 Communication apparatus and communication system
JP2003048364 2003-02-25
PCT/JP2003/002174 WO2003073689A1 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system

Publications (2)

Publication Number Publication Date
EP1480372A1 EP1480372A1 (en) 2004-11-24
EP1480372A4 true EP1480372A4 (en) 2005-04-20

Family

ID=27767759

Family Applications (5)

Application Number Title Priority Date Filing Date
EP11184390A Withdrawn EP2479922A1 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system
EP20110184399 Withdrawn EP2461517A3 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system
EP03707115A Withdrawn EP1480372A4 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system
EP20110184395 Withdrawn EP2479923A1 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system
EP20100154511 Withdrawn EP2276193A1 (en) 2002-02-28 2003-02-27 Communication Apparatus and Decoding Method

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP11184390A Withdrawn EP2479922A1 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system
EP20110184399 Withdrawn EP2461517A3 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP20110184395 Withdrawn EP2479923A1 (en) 2002-02-28 2003-02-27 Communication apparatus and communication system
EP20100154511 Withdrawn EP2276193A1 (en) 2002-02-28 2003-02-27 Communication Apparatus and Decoding Method

Country Status (6)

Country Link
US (5) USRE47356E1 (en)
EP (5) EP2479922A1 (en)
JP (1) JP2004032679A (en)
CN (2) CN101917244A (en)
AU (1) AU2003211745A1 (en)
WO (1) WO2003073689A1 (en)

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USRE47356E1 (en) 2019-04-16
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AU2003211745A1 (en) 2003-09-09
USRE49244E1 (en) 2022-10-11
EP2461517A2 (en) 2012-06-06
CN1643842B (en) 2010-11-10
EP1480372A1 (en) 2004-11-24
US20050123138A1 (en) 2005-06-09
EP2479923A1 (en) 2012-07-25
CN1643842A (en) 2005-07-20
EP2276193A1 (en) 2011-01-19
CN101917244A (en) 2010-12-15
US7515714B2 (en) 2009-04-07
EP2479922A1 (en) 2012-07-25
WO2003073689A1 (en) 2003-09-04

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